Turkish officials have reportedly told the U.S. government that they have proof that Washington Post columnist Jamal Khashoggi was killed inside the Saudi consulate earlier this month.

Khashoggi was last seen at on Oct. 2, entering the consulate to obtain official documents for his wedding, but never left the building and has not been seen since.

Officials told the Washington Post that audio and video recordings confirm that the columnist was killed inside.

“You can hear his voice and the voices of men speaking Arabic,” the source said. “You can hear how he was interrogated, tortured and then murdered.”

The security team then reportedly told staff at the Saudi counsul general to go home early.

While very few concrete details have emerged about Khashoggi’s disappearance and possible murder, the Washington Post reported Wednesday that Mohammed bin Salman, the crown prince of Saudi Arabia, was behind attempts to lure the journalist to the country.

President Trump has stayed controversially quiet about the disappearance of Khashoggi, a U.S. citizen.

“We’re looking at it very strongly,” he said Thursday during a bill signing in the Oval Office. “We’ll be having a report out soon. We’re working with Turkey, we’re working with Saudi Arabia. What happened is a terrible thing, assuming that happened. I mean, maybe we’ll be pleasantly surprised, but somehow I tend to doubt it.”